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Hello All,
I am a new member to the forum and also a new owner of a 2019 Mitsubishi mirage. Is reverse whine on the 5speed manual transmission normal? I have read that some economy cars use straight cut gears for their reverse gear to save on money, but I have not came across anything specific to the mirage.
Thanks - 195spd
Yes, it's normal & I think it's common for most manuals.Quote:
Originally Posted by 195spd
https://www.youtube.com/watch?v=0CcOR1gcU1s
You own my favorite Mirage of them all! 2019 ES manual - has factory cruise control with manual climate controls. It's the only year that happened!
Welcome to the forum!!!!
Thanks for the response, that video was very informative!Quote:
Originally Posted by Mark
Normal noise. All manuals I've ever owned whine in reverse, Muncie M22 rock crusher was awful in my 396 Camaro. Ford top loader in my 429 Mustang whined like a, oh, forget it. Family forum.
Welcome!
Not an engineer but I believe the revers gear is straight cut as compared to slanted. I believe straight gears are more durable(?) but slanted are quieter. I believe straight gears are used in the sequential gearboxes in racing which is partly why they sound so awesome.
That's pretty much the case, or it was until modern racing gearboxes are things even I can comprehend,Quote:
Originally Posted by Ares
As an example the dual clutch Ford automatic transmission is the weirdest beast used in passenger vehicles in many decades. It's total junk but if Ford could truly work out the bugs it would be evolutionary.
The wife's car is an audi TT with DCT and it's pretty flawless.
Some manufacturers (kia) still dont have the programming right (Seltos) but I'm hopeful they'll get there. Albeit just 6 gears, the TT shifts butter smooth and at times, the shift fart is kinda funny.
I've never owned/driven something with more than 6 gears/speeds motorbikes included and wonder how much real improvement there is in say, a 10 spd. over a 5? Ok, twice as may gears but was the power into a 5 spd. that mismatched they needed to double the gears? So why were there never any standards >6 gears?
Since I now own a Honda Passport with the ZF9, I can see the efficiency of having multiple gears. The idea is to keep the RPMs close to each other so its near the power/tq at all times.
However, it's not as efficient as a CVT - which after driving mom's CRV 1.5t I'm not against. I think a the trick to a good CVT experience is having enough power and tq so as not to 'feel' or hear the engine struggling. That said, I can't imagine driving the mirage with a CVT. I'm barely happy enough rowing my own and keeping it on the right RPMs.
Forward gears work by meshing the gears on the output shaft directly with the gears on the intermediate shaft. Reverse gear is accomplished by putting a small extra idler gear between the gears on the intermediate and output shafts which reverses the direction of the output shaft (idler gear marked as #15 in the diagram). This small gear spinning really fast is what you are hearing. Totally normal.
https://i.imgur.com/oq3yzIM.png
I have to say, that I think that's true, but needs a bit more explaining. A vehicle with more gears does or should accelerate more quickly than that said vehicle with the same engine and less gears. Because it should be able to keep the engine rpm higher up in the peak hp / torque rpm by not dropping as far out of the peak hp / torque rpm range as those with few gears.Quote:
Originally Posted by Ares
While simultaneously, those with higher gears should show an improvement in mpg by being able to keep the rpm lower across a greater amount of cruise speeds, than those with fewer gears.
Ultimately, the more gears a transmission has, the closer it comes to being a CVT. And ultimately, a CVT is the ultimate transmission. However, I don't believe they are as robust as a manual transmission, and they've been controlled to act like a X speed automatic transmission which is just pure stupidity IMO. The first Prius I drove (while an engineer at Toyota) seemed to have a CVT that worked exactly how a CVT should work. But admittedly, it was weird driving being so different than any other vehicle I've ever driven. Controls have been added to make them act somewhat like a traditional x-speed transmission. Because feedback to the OEMs was vast and mostly negative, with customers thinking something was wrong with the transmission (CVT) ... because like I said, they did seem very weird when they operate as they were initially intended. Clarification: The CVT seemed weird but it was actually the correct way to operate.
As for cvt being made to act like a traditional automatic, I assume you're talking about the ones that use stepper motors to make it feel like it's shifting? The Mirage cvt doesn't have that stuff. It does have an actual 2speed part to it that shifts around 30mph ish (iirc), otherwise it drive's similar to a regular belt drive cvt atv,utv,skidoo imo. I drove a cvt rogue a month or so ago and it felt completely different, like a wannabee automatic. I don't recall the NV200's feeling like that, they shift kinda like the Mirage cvt. Hit the gas and they rev up then once the rubber band stretches enough they start to go slightly quicker.Quote:
Originally Posted by 7milesout
Yes, that amongst other controls.Quote:
Originally Posted by Fummins
Yes! I don't like that wannabe automatic feel. It's kind of insulting.Quote:
Originally Posted by Fummins
I only drove a CVT G4 like 5 or 6 years ago. I don't remember the feel so much. I remember the feel of the throttle pedal against the floor.
I was in a hurry when posting that lol.Quote:
Originally Posted by 7milesout
As for CVTs not cutting it my 900 CC Thundercat easily produced 200+ hp with the triple expansion pipes. I could thrash that sled all day long, pull 300 yard wheelies, spin the studded track on pavement to create the coolest lightshow at night you ever saw.Quote:
Originally Posted by Fummins
I think I replaced the Kevlar embedded belt for $22 or so twice in the 3 years I had the sled. The second belt was only put on for the purposes of sale. It looked fine still.
I heard the same belts now push $125 and need replacing every season. FTN. Oops. Make that $155!!!